Heating apparatus



Jan. 23, 1934. s. CHADWICK Er AL HEATING APPARATUS Filed Oct. 13, 193011 Sheets-Sheet 2 IN VENTORS A TTORNE K)", M

Jan. 23, 1934. s. CHADWICK ET AL HEATING APPARATUS Filed Oct. 13, 193011 sheets-sheet s @Q o Q a. I m L 0 WV lllllrllm l h lln m.lllll.\lllllllllllwlfll x \J QQ. N.Q.\ v m INVENTORJ' g A TTORNEYJ 7Jan. 23, 1934. L. s. CHADWICK ET AL HEATING APPARATUS 11 Sheets-Sheet 4Filed Oct. 13, 1930 TTORNE Y6 1934- L. s. cHAnwlck El AL 1,944,593

HEAT I NG APPARATUS Filed Oct. 13, 1930 ll Sheets-Sheet 5 11Sheets-Sheet 6 HEATING APPARATUS Filed Oct. 13, 1930 L. S. CHADWICK ElAL Jan. 23, 1934.

Jan. 23, 1934.

HEATING APPARATUS Filed Oct. 13, 1930 11 Sheets- Sheet 7 &

Jan. 23, 1934. s CHADWICK ET AL HEATING APPARATUS 1930 ll Sheets-Sheet 8Filed Oct. 15

Jan. 23, 1934. L. s. CHADWICK ET AL HEATING APPARATUS Filed Oct. 13,1930 11 Sheets-Sheet '9 Jan. 23, 1934. L, s. CHADWICK ET AL HEATINGAPPARATUS Filed Oct. 13, 1930 ll Sheets-Sheet 10- 2 IQ 11v VIENTORS' 41%jw m/e NE y:

Jan. 23, 1934.

L. S CHADWICK El AL- HEATING APPARATUS Filed Oct. 13, 1930 llSheets-Sheet l1 Kati;

/ I ENTQR TTOKNE YJ Patented Jan. 23, 1934 UNITED STATES PATENT orgies1,944,593 HEATING APPARATUS Lee S. Chadwick, Shaker Heights Village, and

Marc Resek and Heights,

Charles J. Kesslcr, Cleveland Ohio, minors to Perfection Stove Company,Cleveland, Ohio, a corporation'of Q hio Application center- 13, 1930.Serial No. 488,210

22 Claim.

adapted to be incorporated in furnaces.

Among the more general objects of the invention' are those of providinga heating stove or apparatus of the above described character that ishighly eflicient; that is very convenient of use with respect tofilling, lighting and cleaning; that is economical in the matter of fuelconsumption; that is substantial, durable and safe, and that, whenembodied in a room heater, is neat and attractive of appearance. Theease or convenience of lighting and cleaning-the latter with respect tothe removal of residue from the fuel pot or basinis brought about by theprovision of a relatively large opening through which access is had tothe interior of the fuel pot or basin.

Further and more specific objects are to provide a construction that iscomparatively simple,

the same being made in most part of sheet metal of suitable gauge and,where practical, in the form of die stampings, the parts being sodesigned as to expedite and cheapen manufacture and facilitate assembly;to provide a heating apparatus of the kind above set forth in whichthere is a fuel pot or basin wherein ignition originates and downwardlyinto which the secondary air is directed so as to create, with the oilvapors and with the primary air that'is admitted through openings in thewall of the pot or basin, a turmoi] that greatly improves thecombustibility of the mixture and tends to keep the fuel pot or basinmore free from soot or carbon than it would otherwise be; to providemeans for delivering the fuel oil to the pot or basin whose function isunimpaired by a considerable accumulation of soot or carbon, or of ashesfrom match sticks or paper used in lighting; and to provide a simple butvery efiective means for removing carbon from the opening that leadsfrom the fuel pot or basin to the combustion chamber, and which meansmay be operated in an especially convenient manner from outside theheater and without interrupting the operation of the same.

Objects and advantages additional to the foregoing will appear as thisdescription proceeds, reference being had to the accompanying drawbottomof the stove casing.

ings whereingvar'ious embodiments of the invention are illustrated andin which like reference characters designate corresponding partsthroughout the several views.

In the drawings, Fig. 1 is a side elevation of a so-called room'heaterincorporating our invention; Fig. 2 is a central vertical section, fromfront to rear, through the lower portion of the heater, the same beingon a scale somewhat enlarged over that of the preceding view; Figs. 3and 4 are horizontal sections on the respective lines 3-3 and 4.-4,0fFig. 2; Fig. 5 is a sectional detail on the line 5-5 of Fig. 1, the samebeing on the same scale as Figs. 2 to 4; Fig. 6

shows parts of the casing in separated condition; Fig. 7 isa fragmentarysectional side elevation of a heater incorporating a modified form'ofthe fuel pot, this form afiording increased heating are sections on therespective lines 10-10 and 11-11 of Fig. 9, these views being on a scalesomewhat smaller than the scale of Fig. 9; and Figs. 12 to 15 are detailviews of a modified form of the casing.

With respect to the casing, the heaters shown in Figs. 1 to 6, and inFigs. 7 and 8, respectively, are the same. In each of these instances,the casing comprises a front panel 1, side panels 2 and a rear panel 3.Each panel has a top flange 5, a bottom flange 6, and side flanges 7,which are turned inwardly at right angles totheir body portions. Theside flanges '7 of the panels are connected by fastening means or bolts8 to the flanges 9 of corner posts 10 that are angular in cross section,as shown in Figs. 3, 4, 5 and 8. The topsof the comer posts 10 and theupper surfaces of the top flanges 5 of the panels are in a common plane,and surmounting them is a topframe 11 having a base flange 12 that isconnected by fastening means or bolts 13 (Fig. 1) to said flanges 7. Thetop frame 11 is constructed of sheet metal and is given a crosssectional shape to effect the appearance w and seals thereof to the topwall 31 and easyfaccess to the interior of the fuel' pot The lower endsof the panels 1, 2 and 3 extend below the lower ends of the corner postsa distance equal to the vertical dimension of a base frame 16, saidframe being attached to the panels with its upper edge substantiallyflush with the lower edges of the corner posts. Legs 1'7 that are formedof sheet metal and are angu- .lar in cross section flt about the cornersof the base frame 16 and are secured thereto by fastening means or bolts18 the inner ones of which extend also through the panels and assist insecuring them to the base frame. Fastening means or bolts 19 secure thelower edges of the panels at their transverse centers to the base frame16. In addition to performing the duties above ascribed to them, thefastening means or bolts 18 and 19 that are associated with the sidepanels 2 also secure in place the vertical flanges of substantial anglemembers whose horizontal flanges provide ledges designated 20 for apurpose that will presently appear.

At their lower ends the side panels 2 are provided with air admittingopenings 25, and at their upper ends with air emitting openings 26 and,although not shown for lack of opportunity, the front panel 3 issimilarly provided with air emitting openings adjacent its upper end. Asuitable distance above its lower edge the front panel 1 is providedwith an opening 2'7, shown as surrounded by an inwardly directed flange,and a closure 28 flts over said opening and is removably held in placeby hooks 29 that are engaged through slots in the panel 1.

Situated centrally within the above described rectangular casing is a c"lindrical drum 30 that is closed at its upper end by a top wall 31having a central opening 32 and, if desired, a peek hole 33. This drumis constructed of a heavy gauge of sheet metal, and all the joints arepreferably welded, and similarly connected to the interior of the drum asuitable distance above its lower end isa flange 35. At its front sidethe peripheral wall of the drum is notched upwardly at its lower end, asindicated at 3'1, to a point slightly below the flange 35. The drum hasangle brackets 38 secured, as by welding, to its exterior adjacent itslower end and the horizontal branches of said brackets rest upon and aresecured to the previously mentioned ledges means or bolts 39. The top ofthe drum is retained in position by a brace 40 that is securedperipheral wall into the opening 2'! of the cas-L and affords or basinfor cleaning-and lighting purposes and is adapted to be closed by aso-called plug 49 provided near its forward end with a handle 50.Pivoted at 51, to lugs 52 that rise from the upper side of the neck 48.is a latch 53 that serves plug 49 within the neck 48. The

ing. This neck is relatively large will ride over the plug when the plugis inserted into the neck, the

20' by fastening is attached at its ends. to diametrically oppositeparts of the top .5). The front edze of but to insure against failure ofthe latch to automatically assume effective position when the plug isinserted, the forward ,end of the latch is made with an extension 54which interferes with the replacing of the closure 28 over the opening27 of the casing unless the latch is in looking position.

An annulartop wall 55 extends inwardly and upwardly from the upper edgeof the peripheral wall of the body 46 and terminates at its inner edgein a downwardly directed lip 56. 'Rigidly secured to and spaced fromthis top wall, as by means of shouldered, double ended rivets 5'7, is anannulus 58 whose inner edge is extended downwardly to form a lip 59'that is spaced inwardly from the previously mentioned lip 56 of J thetop wall 55. The space between the top wall 55 and the annulus 58, andbetween their respective lips 56 and 59, constitutes a passageway 60 forthe admission of secondary air to the interior of the fuel pot or basin49, while. rimary air is adapted to enter the pot or basin throughapertures 61 in the peripheral wall of the body 46. The annulus 58, and'the fuel pot or basin 45 that is rigidly secured thereto in the mannerjust described, are adapted to be attached, as a unit, to the flange 35by fastening means 63. These fastening means are shown as bolts that areextended downwardly through aligned apertures in the flange 35 andannulus 58 and have lock washers and nuts 64 and 65 applied to the lowerends; and to facilitate assembly the heads of the bolts are welded tothe flange 35 so as to secure the bolts in place, inasmuch as the unitconsisting of the fuel pot and annulus has to be applied to the flange35 upwardly from beneath the same when assembling the structure.

The combustion device above tail may, in more general terms, be definedas consisting of a combustion chamber having a 5 neck that is projecteddownwardly into the open top of the fuel pot or basin and sustained inspaced relation thereto to provide between said neck andthe surroundingportion of the pot or basin a secondary air passageway.

To prevent undue radiation of heat downwardly'when the heater is inoperation, a shield 66 is desirably supported within the lower endof thedrum 30 and the same is shown as attached to the peripheral wall thereofby fastening means 6'1.

Extending rearwardly from the upper end of' the drum 30, through anopening 68 in the rear panel 3, isa flue collar diately below '12 toprevent interference with the action of a eleaninl rod or member 73 thatextends downwordly through the opening 32 in the top wall 31 of the drumand has its lower within the opening of the annulus 58 through whichcommunication is established between the combustion chamber '16thereabove and the fuel pot or basin 45therebelow. A frusto-conicalcolint '14, on the rod 73, rests within and closes the opening 32.Access to the upper end of the rod is bad through an aperture providedby notches- 75 inthe adjacent edges of the grids 15 so that a suitabletool may be applied to its upper end for wh rling the rod so as endabout the lip 59 and dislodge any soot or carbon that may haveaccumulatedon the lip and which would hinder free communication be- 15cdescribed in de- I 10; and disposed across the interior of the rear sideof the drum immed collar is a baiile '11 (see Fig. this bame is notchedat end disposedto scrape its lowe1i tween the fuel pot or basin and thecombustion chamber.

One branch of a T-fltting 78 is applied to the flue collar 70, the samebeing shown as secured thereto by fastening means 79, while the opposedbranch of said fitting is equipped with a gravity damper 80 that isbiased toward closed position by a weight 81. The damper 80 is in thenature of a disk that is pivoted at 82 to an annular member 83, saidmember being suitably secured within the fitting. The third branch ofthe fitting rises from a point intermediate its ends and to it isadapted to be attached a stove pipe that leads to a chimney.

While, if desired, any embodiment of the invention may be supplied withoil from a remote tank through suitable connections involving a constantlevel valve, according to common practice, in the form of the inventionnow under consideration, the fuel supply is shown as obtained from aremovable tank or reservoir that is supported by and rearwardly of thestove casing beneath the flue connection thereof. Said tank or reservoirand itsassociated parts will now be described. Secured to the lowerportion of'the rear panel 3 adjacent its lateral edges, and by fasteningmeans or bolts 85 (Figs. 2, 3 and 4) are the base flanges of 2 bars 86.Supported by and between the Z-bars is a shield 87 whose lateral edgesare formed to provide forwardly opening channels for the reception ofthe rear portions of the 2 bars. Brackets are secured, as by fasteningmeans 91, to the lower ends of the 2 bars 86 with the adjacent portionsof the shield 87 clamped between the attaching plates of the bracketsand said bars. The brackets 90 support a pan-like sheet metal receptacle93 whose upper edge is curled about a relatively stin" wire 94, and atspaced points along the rear edge of the vessel the sheet metal is cutaway to expose the wire, and encircling the exposed portions of the wireare hinge members 97. By means of these hinge members a carrier 180 ispivotally connected to the receptacle 93. This carrier comprises a rearwali 10l, side walls 102, and an end wall 103, the latter be'ng shown asequipped with a handle 104. The hinge members 97 are extended throughslots in the wall 101, and the lower edge of said wall is formed with achannel like seat which extends practically from end to end of thereceptacle 93, as shown in Fig. 3. The lower front corners'lod of theside walls 102 rest upon the front corners of the receptacle 93 when thecarrier 100 min normal position, as clearly shown in Fig. 2.

Resting upon a slight elevation that is formed in the bottom wall oi thereceptacle 93 is a shallow cup 111 that is retained in position by abridge plate 112 within an aperture of which the cup is disposed. Thebridge plate is located at about the transverse center of the receptacleC 93, as best shown in Fig. 4, and is supported by and between the frontand rear walls of the re ceptacle. The peripheral wall of the cup 111 isprovided with openings 113 that are spaced a suitable distance above thebottom of the cup and are preferably covered by screens 114 ofrelatively fine mesh. As will be presently seen, the fuel oil enters thereceptacle 93 through the screened opening 113 of the cup 111, thescreens serving to arrest any foreign matter in the oil which wouldotherwise pass'into the receptacle and any water which may be in the oilgradually accumulates within 'the bottom of the cup 111,

[and the cup may be removed and emptied before" the water level reachesthe height of the lower edges of the openings 113.

Sustained normally in inverted position above the receptacle 93 by thecarrier 100 is a removable fuel tanlr or reservoir 115 having a neck 116that is equipped with a cap 117 incorporating a spring closed valve 118,the valve being unseated by contact of its stem with the bottom of thecup 111 when the tank or reservoir is in operative position. Thereservoir 'is supported at the proper elevation by the engagement of itslower rear corner within the seat 105 of the carrier 100, and the sameis liquid sealed by an accumulation of fuel oil within the receptacle 93and cup 111 to a level slightly above the plane of the openingcontrolled by the valve 118. This establishes the liquid level in thefuel pot or basin, as will be evident from what is hereinafterdescribed.

When it is desired to replenish the oil supply it is only necessarytoswing the carrier 100 rearwardly by means of the handle 104 so as toimpart like movement to the tank or reservoir 115, and as the carriermoves below the horizontal plane of its hinge connection with thereceptacle 93, the tank or reservoir will slide downwardly until itengages the end wall 103 of the carrier and withdraw from the seat 105the edge portion which formerly occupied the same. When the carriercomes to rest the tank or reservoir may be lifted therefrom by means ofhandles 120 (Fig. 3) 'wherewith the reservoir is equipped and carriedaway and refilled and returned to the carrier, after which the carriermay, by grasping the handle 104., be swung to its upright positionthereby to invert the tank or reservoir over the vessel 93. As a matterof convenience, and to expedite refueling of the stove, one or morefilled tanks or reservoirs may be kept on hand.

It'is desirable to locate the reservoir at the rear of the heater belowthe hue connection, and hinge the carrier so as to swing rearwardly ofits normal position, for the reason that this arrangernent insures theheater being setfar enough away from the wall having the flue or chimneyto which the heater is connected to prevent heat ng the wall to adangerous degree.

An outlet fitting 125, that depends from the bottom wall of thereceptacle 93, is connected by a ppe 126 to a valve 127 that issupported by a member 128 in the forward right hand corner of the casingof the heater, considering the same as viewed from the front. The member128 is secured by fastening means 129 to the adjacent bracket 38. Theoperating handle 130 of the valve is located in a convenientpositionforwardly of the heater and has an indicator finger 131connected to it which cooperates with a dial 132. This is a standardvalve of the so-called metering type and enables the flow of fuel to beaccurately controlled. The outlet side of the valve is connected by apipe 184 with a fitting 135 that is communicatively connected to thebottomwall orthe sump 47 or the fuel pot or basin 45.

- 34.? From the foregoing it is clear that the fuel is conducted fromthe receptacle 93 to the sump 47. and that the flow of oil'from theformer to the latter is controlled by the valve .127. It is also evidentthat the maximum oil levelin the 1.161 pot or basin cannot exceed thatprevailing in the receptacle 93. With the stove or apparatus standinglevel, as intended, the oil cannot attain a height above the top of thesump 47 and as a consequence of this, even with the valve perforations61 in the 127 inadvertently left open, the oil will be confined to thesump and will not flood the bottom of the fuel .pot ,or basin butrestrict the quantity present therein to a very small amount so thatthere will be no danger of an explosion when the heater is next lighted.

When it is desired to light the heater, the closure 28 and the plug 49are removed and the valve 130 is opened to allow fuel to flow into thesump 47, and a lighted match or taper or a piece of lished by theelevation of the open end of the fuel tank or receptacle 115, aspreviously explained. After the fire is lighted the plug 49 is returnedto position within the neck 48 where it is held by the latch 53, and ifthe plug has been properly emplaced so that normalposition, the closure28 may be engaged over the opening 27. The fire may be regulated fromtime to time by a manipulation of the valve handle 130, and thecharacter of the fire may be ascertained by looking through the peel;hole 33 in the top of the drum 30, thus making it unnecessary to removethe closure 28 and plug 49 for the purpose.

As previously explained, primary air is admitted to the fuel pot orbasin through the peripheral wall of the body 46, and these openings areso arranged and so graduated in size as to effect a proper distributionof the primary air with respect to the oil vapors.

- it may be readily region of the At the same time secondary air isadmitted through the passageway 60, and it is directed downwardly intothe fuel pot or basin by the lip 59. so as to create therein a turmoilwhich causes the air and oil vapors to be thoroughly mixed, insuringtheir burning with the highest efliciency and with the least productionof soot or carbon. When an objectionable amount of soot or carbonaccumulates about the rim of the flre pot or basin, dislodged bywhirling the rod '73 in the manner already described. The soot may beallowed to fall upon the bottom of the fuel pot and gathered there inconsiderable quantity without in any way interfering with the operationof the apparatus. In fact experience has shown that the action of theheater is improved by acertain amount of soot and ash within the fuelpot, and for this reason it is only occasional- 1y necessary to cleanout the fuel pot or basin through the opening of the neck 48.

The volume of combustion takes place above the annulus 58 within thelower portion of the combustion chamber 76 and as the products rise theyare deflected forwardly by the baille '11 before escaping through theflue collar 70. Therefore, while the apparatus is in operation, the wallof the drum 30 becomes highly heated above the fuel pot or basin, andthis heat is given of! to air entering about the bottom of the drumbetween it and the panels of the casing and through the openings 25 inthe side panels. and escaping at the top of the heater through theopenings 26 and through the grids 15. Moisture may be imparted to theair as it risesthrough the casing by a humidifier 140 which consists ofa cylindrical vessel having a closed lower end and open top that issuitably and preferably removably supported within one corner of thecasing the latch descends to adjacent the top of the drum 30, the samebeing adapted to contain water. In enlarging the size of a abovedescribed for the purpose of increasing its heating capacity, there is alimit to which one can go in the enlarging of the fuel pot or basin forthe reason that as the pot or basin increases in diameter the openingsand passageways foradmitting primary and secondary air are so farremoved from the central portion of the pot or basin that such portionis robbed .of air for the promotion of combustion, and, as a consequencethereof, the fire is rendered smoky and inefilcient. larger sizes ofheaters we provide means for conducting air to the central portion orother parts of the fuel pot or basin that are so remote from theperipheral wall as to be incapable of being served with air from theopenings therein and passageways associated therewith. Within a certainrange of sizes it is practical to provide the fuel pot or basin with acentral flue through which air is conducted to the surrounding zone.Such a construction is illustrated in Figs. '7 and 8 wherein the centralflue is designated 46 and is provided with primary air admittingopenings 61 The upper end of the flue is curled over to provide a lip56, and supported by and above the upper end of the ets 57 is a plate 58having a downturned peripheral lip 59*, the space between the plate andflue .providing a secondary air passageway 60. Tovinsure a properdistribution of fuel oil within the bottom'of the pot or basin so thatthe oil vapors will be diffused about the interior of the vessel andthus receive throughout their full extent the air for promotingcombustion, we provide a plurality of sumps 47, two being shown in thepresent instance,.that are connected together by channels 142. The sumpswith inlet connections together by a manifold 143 that is supplied withfuel oil through a pipe 134. In all other respects theconstruction shownin Figs. 7 and 8 is the same as that above described, and like referencecharacters designate the remaining corresponding parts of the twostructures.

When the size of the fuel pot or basin is so enlarged that a centralflue becomes inadequate to supply air to the interior region of thevessel, we may construct the pot or basin as illustrated in Figs. 9, 10and 11. These larger sizes, while being applicable to so-called roomheaters, are also adapted for use in furnaces, and such an adaptation ofthe invention is indicated in the views above mentioned. 7

As shown best in Fig. 11, the body 46 is of clover-leaf shape in planand is provided with a plurality of flues 46 one being located centrallywithin each lobe that corresponds to one of the clover leaves. Thebottom wall of the pot or basin is provided withsumps 47' on oppositesides of each of the flues, and the sumps are interconnected by channels142. As-in the modification last described, each flue is surmounted by aplate 58', connected thereto and spaced therefrom by To meet thissituation in the are equipped 135 that are connected 4 heater ofthe kindflue, through the medium of rivrivets 57 and the secondary air spacesbetween a said plates and flues aredesignated 60 The primary airadmitting openings of the flues are shown at 61 The inlet fittings ofthe sev- 'eral sumps are shown as connected together by may restdirectly upon a cement-or other fireproof floor 147. The shell or casingis provided adjacent its lower end with relatively large air admittingopenings 148 and with adoor'opening that registers with the neck d8 ofthe fuel pot or basin, the same being surrounded by a frame 149 to whicha door 150 is hinged.

As best shown in Fig, 10, the flange 35 and the plate 58 that isconnected thereto have openings corresponding in shape to that of thefuel pot or basin. The rod 73 may be swung about the periphery of theopening in the member 58 and about each of the plates 58 for the purposeof dislodging soot or carbon, substantially in the same manner as in theformer instances. Especially in the case of a furnace, the fuel oil maybe supplied from a remote source through a pipe 126 that leads to themetering valve 127";

In the modified form of casing, illustrated in Figs. 12 to 15, twocorner posts are formed integral with each of two opposed side panels,while the other two panels remain as before. though, so far as theinvention is concerned, the corner posts may be incorporated in eitherthe front and rear panels, designated 1 and 3 respectively, or in theside panels 2, we prefer to show them as made a part of the latter.

Adjacent the lateral edge of the side panels 2 the material whereof theyare constructed is extended outwardly approximately the thickness of thebase frame 16, as shown at 155, and then into planes parallel with thebody portions of the panels until given right angle turns inwardly todefine the corners of the posts 10 The extreme lateral edges of thepanels are then turned toward each other to form flanges 156. The panelshave top and bottom flanges, 5 and 6, respectively, as in the previousinstance, and the bottom flange 12 of the top frame 11 is shown assecured by fastening means 13 to the top flanges 5 The side flanges ofthe front and rear panels are connected by fastening means 8 to theflanges tial construction, as it will be readily appreciated,

and one that is quicker and more convenient of assembly than thepreviously described form.

Having thus described our invention, what we claim is:

1. Heating apparatus comprising, in combination, a fuel basin havingmeans for admitting primary air thereto, and a combustion chamber abovethe same having a neck that projects into the basin and is in spacedrelation to the rim thereof so that secondary air that is drawn inthrough the space between the combustion chamber and fuel basin isdeflected downwardly into the basin.

2. Heating apparatus comprising, in combiner tion, a fuel basin havingmeans for admitting primary air thereto, a cover for said basin PTO-evided with an opening, and a combustio chamber above the basin andhaving a neck that projects" into said opening and is spaced from thesurrounding portion of the cover so that secondary air drawn in throughthe space betwednthe cover and the neck is deflected downwardly into thefuel basin.

3. Heating apparatus comprising, in combination, a fuel basin havingmeans for admitting primary air thereto, a cover for said basin providedwith an opening, the material of said cover about said opening beingturned downwardly, and a combustion chamber above the basin having abottom wall that is spaced from the cover and is provided with anopening about which the material of said wall is turned downwardly toform a neck that projects into the opening of the cover in spacedrelation to the edge thereof so that secondary air that is drawn inthrough the space between said bottom wall and the cover is deflecteddownwardly into the fuel basin. J

4. Heating apparatus comprising, in combi-- nation, a combustion chamberhaving a bottom wall provided with an opening about which thematerial ofthe wall is extended downwardly to form a neck, a fuel basin havingmeans for ad.- mitting primary air thereto and provided with a coverhaving an opening into which said neck projects, and means connectingand spacing apart the cover of the fuel basin and the bottom wall of thecombustion chamber and by means of which the fuel basin is supported.

5. Heating apparatus comprising, in combination, a cylindrical drumenclosing a combus tion chamber and having a flue outlet adjacent itsupper end, a flange extending about the interior of the drum above thelower end thereof and defining the lower end of the combustion chamber,a member engaged with the underside of and secured to said flange andhaving an opening surrounded by a depending lip, a fuel pot having a topwall secured to and spaced from said member and having an opening largerthan and registering with the opening of said memher, the opening insaid top wall being surrounded by a. depending lip that is spacedoutwardly from the aforesaid lipso that air entering between the lipswill be deflected downwardly, the fuel pot being provided with primaryair open ings, and means for delivering fuel to the fuel pot.

6. Heating apparatus comprising, in combi-- nation, a combustion chamberhaving a top wall provided with a relatively small opening and a bottomwall provided with a relatively large opening, a combustion devicesupported below the opening of the bottom wall, and a cleaning memberdepending through and closing the opening in the top wall of thecombustion chamber and projecting into the opening of the bottom wallthereof and being capable of being moved about the latter openingwithoutuncovering the former opening.

7. Heating apparatus comprising, in combination, a combustion chamberhaving a flue outlet adjacent its upper end, a fuel pot supported belowthe combustion chamber, said fuel pot having a relatively largelaterally projecting neck,- a plug removably fitted within said neck,and a latch movably carried by the, neck for cooperation with said plugto retain it in place. a

8. Heating apparatus comprising, in combine.- tion, a. casing, a.combustion chamber supported 'withinthecasing in spaced relation to thewalls thereof, the combustion chamber having a flue outlet adjacent itsupper end. a fuel not sup ported below the combustion chamber andhaving-a neck extending laterally from one side .thereof, the casinghaving an opening through ,which access may be had tov the neck of theElli - ,said latch serving to prevent the closure from asfuel pot, amember for closing neck of fuel pot, a latch for holding said member inplace, and a closure for the-opening of the casing,

suming normal position excepting when latch is in member holdingposition.

9. Heating apparatus consisting of a combustion chamber, and a fuelbasin below the combustion chamber, the apparatus having a throatopening through which said chamber and basin communicate, and a rodloosely sustained by the the upper portion of the apparatus anddepending through said opening and operable to clear the opening ofcarbon deposit.

10. Heating apparatus consisting of a combustion chamber, and a fuelbasin below the combustion chamber, the apparatus having a throatopening through which said chamber and basin communicate, a wall abovethe combustion chamber having anaperture that is substantially invertical alignmentwith said throat opening, and

a rod extending through said aperture and depending within said throatopening and operable from above said wall to clear the opening of carbondeposit.

11. Heating apparatus consisting of a combustion chamber, and a fuelbasin below the combustion chamber, the apparatus having a throatopening through which said chamber and basin communicate, a wall abovethe combustion chamber having an aperture that is substantially invertical alignment with said throat opening, a rod extending throughsaid aperture and del pending within said throat opening and operablefrom above said wall to clear the opening of-carbon deposit, and anupwardly diverging collar on said rod that serves to close the apertureand support the rod. a

12. Heating apparatus comprising, in combination, a combustion chamber,a fuel basin below the combustion chamber, a flue rising from the bottomwall of the fuel basin for admitting air, the bottom wall being providedwith sumps v and channels connecting said sumps, and means fordelivering fuel oil to the sumps.

13. Heating apparatus comprising, in combination, a combustion chamber,a fuel basin below the combustion chamber, a-flue rising from the bottomwall of the fuel basin for admitting air, the bottom wall being providedwith sumps on opposite sides of said flue and channels connecting saidsumps, and means for delivering fuel oil to the sumps.

14'. Heating apparatus comprising, in combi-. nation, a combustionchamber having an opening at its lower end surrounded by a' dependinglip, a fuel basin having an open top spaced below the aforesaid openingand from. said lip so that secondary air may enter through thespacethus' provided and be directed downwardly into the fuel basin bysaid lip, a flue rising from the bottom wall of the fuel basin to aboutthe plane of the top of the basin, a plate spaced above the upper end ofthe flue and surrounded by a desupported above and in spaced relation tothe upper ends of said flues to provide passageways for the admission ofsecondary air, the peripheral wall of the fuel basin and said flueshaving perforations for the entrance of primary air, the bottom wall ofthe fuel basin having sumps on opposite sides of each of the flues andchannels connecting said sumps, and means for delivering fuel oil to thesumps. l

16. Heating apparatus comprising, in com bination, a drum enclosing acombustion chamber, a partition spaced above the lower endof the drumand defining the bottom of the chamber, said partition having an openingthat is surrounded by a depending lip, a fuel pot having a top wallprovided with an opening registering with the opening in the partitionand surrounded by a depen lip which is spaced outwardly from the formerlip thereby tov provide between the two a secondary passageway, a fluerising from the'bottom' wall of the fuel pot and having 1 its upper endflared outwardly and downwardly :in substantially the plane of the topwallof the fuel pot, a plate supported by and above the flue in spacedrelation to the top thereof and having its peripheral portion flangeddown- 1 5 wardly to provide a lip that is spaced from the flared top ofthe flue, the peripheral wall of the fuel pot and said flue havingperforations for the entrance of primary air, the bottom wall of thefuel pot having sumps on opposite sides IlQ of the flue and channelsconnecting said sumps,

and means for admitting fuel oil to the sumps,

, 17. Heating apparatus comprising a casing having an internal flangespaced above its lower end, and a. unitary structure within the casingbelow said flange'and consisting of a fuel pot having a top wallprovided with an opening and a member permanently secured to and spacedfrom said top wall and having an opening registering with the opening ofthe top wall, the 121! spacing of said member from said well providing arestricted air passage, the peripheral portion of said member beingarranged for engagement with the underside of the flange, and fasteningmeans removably attaching the unitary structure to the flange andpositioning it in definite relation thereto.

being arranged for engagement with the under-- side of the flange, andfastening means extending through aligned holes in the annulus andflange for removably attaching the said unitary 14 structure to theflange in a definite position with respect thereto. 7

19. In heating apparatus of the class set forth, a flrepot havingperforations in its side wall, means for delivering fuel to'the bottomof the pot for vaporization andmixing with air ente'ring through saidperforations, said side wall being interrupted by a hand hole, and meansfor closing saidhole. v

20. In heating apparatus of the class set forth, 15

a firepot having perforations in its peripheral wall, means fordelivering fuel to the bottom portion of the pot for vaporization andmixing with air entering through said perforations, said peripheral wallhaving a hand hole, a neck extending laterally from said wall aboutthehand hole, a plug insertable within the neck for closing the openingtherethrough, and means for locking the plug within the neck.

22. In heating apparatus of the class set forth. "a firepot havingperforations in its peripheral wall, means for delivering fuel to thebottom portion of the pot for vaporization and mixing with air enteringthrough-said perforations, said peripheral wall having a hand hole, aneck-extending laterally from said wall about the hand hole, and a plugprojecting into the neck fromthe outer end thereof and removable fromthe neck and whose inner end is adjacent the plane of said peripheralwall.

LEE S, CHADWICK. MARC RESEK. CHARLES J. KESSLER.

